| 1 | 1、命令: |
| 2 | |
| 3 | ASUS@huangxiaoshan MINGW64 /e/phpStudy/WWW/blog |
| 4 | |
| 5 | ${content}nbsp;php artisan make:migration create_articles_table --create=articles |
| 6 | |
| 7 | Created Migration: 2017_11_23_112358_create_articles_table |
| 8 | |
| 9 | 2、此时， database/migrations 目录中会多出一个***_create_articles_table.php文件，文件内容如下： |
| 10 | |
| 11 | |
| 12 | |
| 13 | |
| 14 | use Illuminate\Support\Facades\Schema; |
| 15 | |
| 16 | use Illuminate\Database\Schema\Blueprint; |
| 17 | |
| 18 | use Illuminate\Database\Migrations\Migration; |
| 19 | |
| 20 | |
| 21 | class CreateArticlesTable extends Migration { |
| 22 | |
| 23 | |
| 24 | /** |
| 25 | |
| 26 | * Run the migrations. |
| 27 | |
| 28 | * |
| 29 | |
| 30 | * @return void |
| 31 | |
| 32 | */ |
| 33 | |
| 34 | public function up() { |
| 35 | |
| 36 | Schema::create('articles', function (Blueprint $table) { |
| 37 | |
| 38 | $table->increments('id'); |
| 39 | |
| 40 | $table->timestamps(); |
| 41 | |
| 42 | up() 方法中创建了一个自增ID，其中的 timestamps() 方法会生成 created_at 和 updated_at 两个时间列。 |
| 43 | |
| 44 | }); |
| 45 | |
| 46 | } |
| 47 | |
| 48 | |
| 49 | /** |
| 50 | |
| 51 | * Reverse the migrations. |
| 52 | |
| 53 | * |
| 54 | |
| 55 | * @return void |
| 56 | |
| 57 | */ |
| 58 | |
| 59 | public function down() { |
| 60 | |
| 61 | Schema::dropIfExists('articles'); |
| 62 | |
| 63 | } |
| 64 | |
| 65 | |
| 66 | } |
| 67 | |
| 68 | 3、执行迁移 php artisan migrate # 此命令按生成文件的时间顺序执行，如果被执行过了，就不执行了。 |
| 69 | |
| 70 | 4、查看数据库，里面已经生成了相关数据表。 |
| 71 | |
| 72 | 5、想在表article里面新增一个字段如何 |
| 73 | |
| 74 | a、执行命令 |
| 75 | |
| 76 | ASUS@huangxiaoshan MINGW64 /e/phpStudy/WWW/blog |
| 77 | |
| 78 | ${content}nbsp;php artisan make:migration add_excerpt_to_articles_table --table=articles |
| 79 | |
| 80 | Created Migration: 2017_11_23_113826_add_excerpt_to_articles_table |
| 81 | |
| 82 | |
| 83 | ASUS@huangxiaoshan MINGW64 /e/phpStudy/WWW/blog |
| 84 | |
| 85 | $ |
| 86 | |
| 87 | b、文件内容如下： |
| 88 | |
| 89 | |
| 90 | |
| 91 | |
| 92 | use Illuminate\Support\Facades\Schema; |
| 93 | |
| 94 | use Illuminate\Database\Schema\Blueprint; |
| 95 | |
| 96 | use Illuminate\Database\Migrations\Migration; |
| 97 | |
| 98 | |
| 99 | class AddExcerptToArticlesTable extends Migration { |
| 100 | |
| 101 | |
| 102 | /** |
| 103 | |
| 104 | * Run the migrations. |
| 105 | |
| 106 | * |
| 107 | |
| 108 | * @return void |
| 109 | |
| 110 | */ |
| 111 | |
| 112 | public function up() { |
| 113 | |
| 114 | Schema::table('articles', function (Blueprint $table) { |
| 115 | |
| 116 | // 手动新增 |
| 117 | |
| 118 | $table->text('excerpt')->nullable(); |
| 119 | |
| 120 | }); |
| 121 | |
| 122 | } |
| 123 | |
| 124 | |
| 125 | /** |
| 126 | |
| 127 | * Reverse the migrations. |
| 128 | |
| 129 | * |
| 130 | |
| 131 | * @return void |
| 132 | |
| 133 | */ |
| 134 | |
| 135 | public function down() { |
| 136 | |
| 137 | Schema::table('articles', function (Blueprint $table) { |
| 138 | |
| 139 | // |
| 140 | |
| 141 | $table->dropColumn('excerpt'); |
| 142 | |
| 143 | }); |
| 144 | |
| 145 | } |
| 146 | |
| 147 | |
| 148 | } |
| 149 | |
| 150 | c、再次执行迁移，刷新数据库发现新增了字段。 |
